A long-lasting silicon nitride igniter and Adaptive Learning Algorithum comprise our SureStart ignition system. The silicon nitride igniter, which is significantly more durable than the igniters used in many competitors furnaces, is so rugged that it has been pressed through a piece of wood without breaking. To maximize the life of the igniter, a patented Adaptive Learning Algorithum ensures that the igniter provides just the right amount of heat for safe start-ups. The system also automatically compensates for variations in line voltage.